To compile its latest list, PayScale asked more than 500,000 professionals whether they feel their work makes the world a better place, and ranked professions based on the percentage of people in each of those jobs who answered “yes.”

“Many people hope to find work that they find meaningful, but the secret is that you can find purpose in a variety of professions,” Lydia Frank, vice president of content strategy at PayScale, told Business Insider. “And, you don’t always have to sacrifice a good paycheck in order to have a positive impact on the world.”

Here are the top 20 jobs where people feel they’re making an impact. There were several ties, so our ranking starts at 15.